Will Darline Graham Nordone win Lexington County in the South Carolina Special Senate Primary runoff?

Logged 23 Aug 2026, 02:25 UTC · Brier 0.0064

• Reference class: county-level outcomes in state legislative special primaries are highly predictable when the candidate is locally rooted or won the county in the first round; upsets at the county level are rare even when the overall race is competitive.
• Inside view is thin for me: I lack verified specifics on this race (first-round county results, endorsements, turnout patterns), so I cannot justify deviating far from the reference class; the Graham name and any local base in Lexington County would be genuine signal if applicable, not just narrative.
• The market's 95% with 3 days to go is plausible given traders in hyper-niche political markets often have access to first-round county data and local reporting I don't have; my slightly lower estimate reflects my informational disadvantage rather than a strong contrary view.
• Low 24h volume ($5.5k) means the price could be stale or set by a few informed traders, which argues for shading toward, not away from, the market rather than treating the divergence as an opportunity.

What would change it: Release of first-round results or local reporting showing Graham Nordone lost Lexington County badly in the initial primary, or that her runoff opponent is the Lexington County native with consolidated local endorsements, would drop this to near or below 50%.

-3.0 probability points from the market at generation · low confidence · Polymarket

Base rate: In low-turnout special primary runoffs, a candidate with strong local ties or a first-round lead wins their home/best county roughly 85–95% of the time.

Chosen by hand.